Juan M.

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Leapout Digital

Software Developer

Delivered backend services for hospitality platforms using Node.js (Express), PHP (CodeIgniter/Laravel), and Java (Spring MVC). Migrated critical workflows to Go microservices, including billing reconciliation and real-time booking confirmation services. Built and maintained Django-based reporting dashboards for business clients, integrating data from multiple sources. Developed booking APIs and payment workflows with REST standards and OAuth authentication for third-party integrations. Built and deployed dynamic admin panels in React and AngularJS, including calendar tools, pricing rules, and availability grids. Integrated Stripe and PayPal billing with webhook tracking and multi-currency support across regional clients. Improved backend response times by 30% with Redis caching, optimized SQL queries (MySQL/PostgreSQL), and asynchronous job queues. Managed CI/CD with Jenkins and shell scripts; deployed infrastructure to AWS EC2, RDS, and S3. Created task automation and log analysis tools using Python (Flask) and bio-based job runners. Collaborated cross-functionally with designers and QA engineers to deliver production-grade features with pixel-perfect UI.

Accenture

Senior Full Stack Developer

Led full-stack development of healthcare platform focused on women’s wellness, integrating Claude AI as a medical chatbot and health assistant. Planned and built backend services using Python (FastAPI) and Node.js, with secure API layers, rate-limiting, and HIPAA-compliant data access. Implemented semantic search using Voyage AI embeddings and Milvus vector database, enabling personalized and context-aware health queries. Integrated Strapi CMS for content management and deployed infrastructure across AWS EC2, RDS, and Render with CI/CD automation. Built the frontend in Next.js with SSR and SSG, styled using Tailwind CSS, and connected with Stripe for subscription payments and user onboarding. Developed admin dashboards and dynamic UI components in React, Vue.js, and Angular, ensuring accessibility and cross-browser consistency. Led AI prompt engineering and fine-tuning logic to improve Claude’s contextual memory and reduce hallucinations in multi-turn conversations. Collaborated with data scientists and stakeholders to iterate quickly on product features, A/B test health journeys, and optimize user experience. Automated E2E and integration testing using Cypress and Jest, maintaining over 90% test coverage and rapid deployment cycles. Mentored junior engineers and facilitated cross-functional workshops to align AI, product, and engineering goals.

MBOX Smart Lockers

Full Stack Engineer

Spearheaded development of a geo-distributed luggage platform using React (Next.js SSR/SSG) and NestJS (Node.js), achieving sub-150ms real-time location-based search across 20+ global cities. Transitioned from monolithic Django APIs to a microservices architecture using Node.js and GCP Pub/Sub, resolving scalability bottlenecks and reducing service downtime. Standardized front-end workflows via a TypeScript monorepo, shared React design system, and Storybook, improving UI consistency across portals. Engineered multi-tenant microfrontend architecture using Next.js and Webpack Module Federation, reducing cross-service dependencies by 40% and enabling independent deployments. Refactored legacy services into stateless, event-driven microservices using NestJS, Django REST Framework, AWS SQS, and GCP Pub/Sub for eventual consistency in bookings and payments. Automated infrastructure provisioning with Terraform for ECS Fargate deployments; improved TTFB using Cloudflare Edge Caching. Implemented Redis caching, tuned PostgreSQL performance, and integrated Datadog APM into Node.js and Python services for real-time latency monitoring and incident prevention. Built a full CI/CD pipeline with GitHub Actions, integrating Jest, Cypress, and blue-green deployments with automated rollback triggers.

Senior Full Stack Engineer

Architected a real-time trivia platform using Node.js (NestJS) with distributed microservices for game logic, matchmaking, and score aggregation. Enhanced internal APIs and utilities in Go (Gin) for high-concurrency processes like leaderboard sync and player session management. Built supplementary backend services using Python (FastAPI) for analytics, deployment tooling, and telemetry ingestion. Integrated Spring Boot into an authentication service to support legacy Java clients and enterprise identity providers. Designed and deployed frontend features in React 18 and Vue 3, using Tailwind CSS and Composition API for modular UI. Built and maintained robust REST and GraphQL APIs with TypeORM, class-validator, and Apollo Server for data access. Blended Claude and GPT-4 to power dynamic quiz generation, smart hints, and AI-based content moderation for trivia questions. Created a unified monorepo setup using Nx, supporting shared code across multiple frontend and backend projects. Designed and implemented secure OAuth 2.0 login flows and JWT-based token management with RBAC permissions. Configured CI/CD pipelines with GitHub Actions, Docker, and Terraform, deploying to AWS Lambda, S3, and CloudFront. Monitored production performance with Sentry, Prometheus, and Google Analytics; reduced incident response time by 60%.